include/exec/plugin-gen.h

   1 /*
   2  * Copyright (C) 2017, Emilio G. Cota <cota@braap.org>
   3  *
   4  * License: GNU GPL, version 2 or later.
   5  *   See the COPYING file in the top-level directory.
   6  *
   7  * plugin-gen.h - TCG-dependent definitions for generating plugin code
   8  *
   9  * This header should be included only from plugin.c and C files that emit
  10  * TCG code.
  11  */
  12 #ifndef QEMU_PLUGIN_GEN_H
  13 #define QEMU_PLUGIN_GEN_H
  14
  15 #include "qemu/plugin.h"
  16 #include "tcg/tcg.h"
  17
  18 struct DisasContextBase;
  19
  20 #ifdef CONFIG_PLUGIN
  21
  22 bool plugin_gen_tb_start(CPUState *cpu, const struct DisasContextBase *db,
  23                          bool supress);
  24 void plugin_gen_tb_end(CPUState *cpu);
  25 void plugin_gen_insn_start(CPUState *cpu, const struct DisasContextBase *db);
  26 void plugin_gen_insn_end(void);
  27
  28 void plugin_gen_disable_mem_helpers(void);
  29 void plugin_gen_empty_mem_callback(TCGv addr, uint32_t info);
  30
  31 static inline void plugin_insn_append(abi_ptr pc, const void *from, size_t size)
  32 {
  33     struct qemu_plugin_insn *insn = tcg_ctx->plugin_insn;
  34     abi_ptr off;
  35
  36     if (insn == NULL) {
  37         return;
  38     }
  39     off = pc - insn->vaddr;
  40     if (off < insn->data->len) {
  41         g_byte_array_set_size(insn->data, off);
  42     } else if (off > insn->data->len) {
  43         /* we have an unexpected gap */
  44         g_assert_not_reached();
  45     }
  46
  47     insn->data = g_byte_array_append(insn->data, from, size);
  48 }
  49
  50 #else /* !CONFIG_PLUGIN */
  51
  52 static inline bool
  53 plugin_gen_tb_start(CPUState *cpu, const struct DisasContextBase *db, bool sup)
  54 {
  55     return false;
  56 }
  57
  58 static inline
  59 void plugin_gen_insn_start(CPUState *cpu, const struct DisasContextBase *db)
  60 { }
  61
  62 static inline void plugin_gen_insn_end(void)
  63 { }
  64
  65 static inline void plugin_gen_tb_end(CPUState *cpu)
  66 { }
  67
  68 static inline void plugin_gen_disable_mem_helpers(void)
  69 { }
  70
  71 static inline void plugin_gen_empty_mem_callback(TCGv addr, uint32_t info)
  72 { }
  73
  74 static inline void plugin_insn_append(abi_ptr pc, const void *from, size_t size)
  75 { }
  76
  77 #endif /* CONFIG_PLUGIN */
  78
  79 #endif /* QEMU_PLUGIN_GEN_H */
  80